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Residual stress induced R-curves in laminar ceramics that exhibit a threshold strength

Rao, Masa P. and Rödel, Jürgen and Lange, Fred F. (2001):
Residual stress induced R-curves in laminar ceramics that exhibit a threshold strength.
In: Journal of the American Ceramic Society, AMER CERAMIC SOC, 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 USA, pp. 2722-2724, 84, (11), ISSN 0002-7820, [Article]

Abstract

A stress intensity (K) function describing the extension of a crack through bounding compressive layers has been experimentally verified using two methods. For one method the crack length was measured using a replicating technique; in the other, the crack length was continuously measured in situ with an optical microscope during loading. In both, cracks were observed to propagate in a stable, nearly straight path across the compressive layer with increasing applied stress. Catastrophic failure was observed when the crack fully extended across the compressive layers at an applied stress predicted and described as the threshold stress. This behavior and agreement were valid only when either the compressive stress or the thickness of the compressive layer was small.

Item Type: Article
Erschienen: 2001
Creators: Rao, Masa P. and Rödel, Jürgen and Lange, Fred F.
Title: Residual stress induced R-curves in laminar ceramics that exhibit a threshold strength
Language: English
Abstract:

A stress intensity (K) function describing the extension of a crack through bounding compressive layers has been experimentally verified using two methods. For one method the crack length was measured using a replicating technique; in the other, the crack length was continuously measured in situ with an optical microscope during loading. In both, cracks were observed to propagate in a stable, nearly straight path across the compressive layer with increasing applied stress. Catastrophic failure was observed when the crack fully extended across the compressive layers at an applied stress predicted and described as the threshold stress. This behavior and agreement were valid only when either the compressive stress or the thickness of the compressive layer was small.

Journal or Publication Title: Journal of the American Ceramic Society
Volume: 84
Number: 11
Publisher: AMER CERAMIC SOC, 735 CERAMIC PLACE, PO BOX 6136, WESTERVILLE, OH 43081-6136 USA
Uncontrolled Keywords: ALUMINA; COMPOSITES
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 14 Jul 2011 09:04
Identification Number: 491YE
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